Brake-control mechanism



April l5,v 1930. R. s. GANS 1,754,354

BRAKE CONTROL` MECHANISM Filed July 28, 192e Y 9,11 Y( j INVENTOR. 5:* Y gj e' 5. 6227s.

- ATTORNEY.

Patented A,... 15, 1930 g ,1,754,354A

UNITED STATES PATENT. FFIE normar Gans; or DET-noir, MIcHIGAn 'A 'i u Y u l i `)23Min-contraen meenemen l Appleman nledluly 28.1926. sealan; I125,379.

This invention relates to control mechashown in the full lines in Fig. 1, Which isthe nism and has to do particularly With mecha off position of the brakes. For-this purnismwhich is useful for the control of brakes pose a coil spring may be provided, and this onaanl automotive vehicle. i. coil spring has one end connected to the lever 5 It is an object of this invention to-provi-de vand another endsecured to a stationary part 55 y a control mechanism in which ample pressure 6. A= member 10, in the nature of a link, is Q can nbeapplied to a draft rod, and brakes, pivotally mounted to astationary partfofthe Without the requirement of undue amount of automobile, such as the frame or a portion of vap liedvpressure on the part ofan operator. the engine. The end of thefmember 10, opn .an automotive vehicle, the Voperative posite the point Whereit is pivoted,is lcon- 60 movement should not be a large one,v that is, nected to a draft rod-12,1Which extends to the it mustV not travel through a great distance.y brakes of the automobile.` The invention contemplates a mechanism in The 4member 10 is designed to rock upon which relatively small effort on the` part of its pivot 11 in order to apply or release the n '15 anoperator will apply a large pressure or brakes. yFor thispurpose thelever 2 is pro- 65 pull on the draft rod, and this isaccomplishcd videdwith a roller 15 which contacts with Without involving a movement on the part i the member 10, and-:which rolls over the surof an operator which is out of keeping with face 16 ofthe member. It will be observed the requirements of an' automotive vehicle. that the member '.10 i intersects the arcl of 20 According to the invention, thepull .on the movement of theroller 1 5 and that Whenthe `70 draft rod is overcome, in the main, by .posi-` pedal 2 is pushed by an operator, the roller :r

tive connections to rigid and relatively'immoves -along the member. 10l and rocks it movable parts of .the vehicle. vThe pull on about its -pirot so as to apply the, brakes the draft rod is not directly communicated .to `of vthe lvehicle. The surface with Which the 25 the operatonand thus it is notnecessary for` `roller contacts may be made relativelyrabrupt,`

` the operator to overcomethe entire draft rod as shown at 17.V This is `for the purpose of pull. The mechanism is of such a nature `th at causing a `relatively larfre initial movement the brake pressure is variable4 by varying the of the member `10-in order to take. up slack position of the mechanism parts, and this or play in the brakes. so var ing of the position of the parts is accomlThe action obtained by the mechanism is 80 plis ed by the operatonvvitha minimum of \similar to that ofthe inclined plane. The

exertion. .v roller 15 is caused to movealong the` inclinedf f A control mechanism constructed in accord-v surface 16 so as to rock thememb-er.A10-about ance with'the invention is shown in theV acits pivot. .When the brakes arevapplied, the 33 companying drawings which are somewhat pull on the draft rod'is taken up by the frame diagrammatical and wherein: l oflthe automobile through the connections 4 Fig. 1 is aivew of a foot lever of an aultorim-y and 1.1. VThe :pull exerted by the draft rod bile for operating the brakes showing, in full uponthe member 10 causes this member to lines the off position, and in dotted lines the act in the natureof a lever tending to ful- 40 on position. I Crum around the roller 15. The strain upon 90 Fig. -2 is a view similar to Figlshowing the member 15 iscommunicated to the frame the parts in on position. 7 through the connection. Il, and movement of Referring to the drawings, the Hoor boards the member 10 is prevented by its connectiony of an automobile are shown at 1, and av con-` to the `frame at 11; Owing tothe fact that trol lever 2, Which'is operable by the foot of the angle between the arc' of .movement of 95 lthe operator, extends through the floor. the roller 15, and thesurface'l of the pivboardsl The lever 2 is provided with a pedal oted memberl 10, is relatively small, a very 3, and the lever is pivoted, as at 4, to a rigid small proportionzof the pull ofv the-draft rod-- part of the automobile, such as the frame. iscommunicated through the lever 2 tothe The pedal normally assumes the position footof the operator. 100

`parts of the lever.

For the purpose of illustration, the invention hasbeen shown and described in connection with afoot lever of an automobile. It will be understood, however, that the brake control mechanism may be applied as well to a hand operated lever and may be utilized for vthe control of mechanism other than brakes. In some instances it may be desirable to not use a roller, as any other type of sliding connection may be used. Also, it may be desirable to make the lever of bifureated construction so that a roller or stud may be securely fastened between the bifurcated I claim:

1. A control device for brakes, or the like, comprising a lever, a pivoted link having a cam surface, brake means connected to the link, engaging means on the lever for slidably enfraging the cam surface so that movement ofc the lever rocks the link and actuates the brake means, the said lever and link being positioned and coordinated so that a line drawn through the fulcrum point of the lever, the point of engagement with the cam surface yand the pivotal point of the link forms an angle which progressively changes and approaches a right angle as the brakes are applied with the line drawn through the fulcrum point of the lever and said engaging means progressively approaching parallelism With t e line of pull by the brake means whereby the brake tension is overcome in the main by the fulcrum point of the lever and pivot point of the link. u

2. A control device for brakes, or the like, comprising a lever, a pivoted link having a cam surface, brake means connected to the link, engaging means on the lever for slidably engaging the cam surface so that movement of the lever rocks the link and actuates the brake means, the said lever and link being positioned and coordinated with respect to their pivotal points so that a line drawn through the fulcrum point of the lever, the point of engagement with the cam surface and the ivotal point of the link form an angle which progressively changes and approaches a right angle as the brakes are applied with the line drawn through the fulcrum point of the lever and said engaging means progressively a preaching parallelism with the line of pullJ by the brake means whereby the braking tension is overcome in the main by the fulcrum point of the lever and the pivot oint of the link.

3. A contro device'for brakes, or the like, comprising a lever, a pivoted link having a cam surface, brake means connected to the link, engaging means on the lever for slidably engaging thel cam surface so that movement of the lever rocks the link and actuates the bra-ke means, the said cam surface being disposed at a relatively abrupt angle to the adjacent portion of the lever, and the lever and link being coordinated so that as the.

creases in abruptness with the line drawn' through the fulcrum point of the lever and said engaging means progressively a proaching parallelism with the line of pu l by the brake means whereby as the brake tension progressively increases such tension is overcome in a progressively increasing degree by the fulcrum point of the lever and the pivot point of thelink.

4. A control device for brakes, or the like, comprising a lever, a pivoted link having a cam surface which intersects the lever at a point removed from its fulcrum point, brake means operably connected to the said link, and engaging means on the lever for slidably engaging said cam surface so that.upon movenient of the lever the link is rocked about its pivot to actuate said brake means, the said lever and link being coordinated so that the angle at which the cam surface intersects the lever progressively approaches a right angle as the lever and link are rocked to apply the brakes, with the line drawn through the fulcrum point of the lever and said engaging means progressively approaching parallelism with the line of pull by the brake means whereby the increasing brake tension is overcome in a progressively increasing degree by the fulcrum point on the lever.

5. A control device for brakes or the like, comprising a pivoted lever, a link bent midway of its length and pivoted at one end, said link being disposed to intersect the lever, brake means connected to the link, engaging means on the lever for engagement with the bent link at the point of intersection, said engaging means moving in an are upon lever actuation, the engaged surface of the link on one side of the bend intersecting said arc whereby lever actuation rocks the link as the said engaging means moves along the engaged surface of the link, said engaging means being adapted to move substantially into the hollow portion of the bendof the link when the brakes are fully applied, with the angle formed by lines drawn from the fulcrum of the lever through the said engaging means, and a line from said enga ing means through the fulcrum of the link orming an angle which more nearly approximates a right angle, when the engaging means is in the said hollow portion of the link, than the angle formed by the said lines when the engaging means is removed from the hollow portion and the brakes are in ofi' position.

In testimony whereof I aflix my signature.

ROBERT S. GANS. 

